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<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container{
      width: 185px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  </style>
</head>
<body>
  <div class="container">
    定长容器，超出用...代替,aaaaaaaaaaaaaaa
  </div>
</body>
</html>